The Brady Bunch S04 E02 Pass the Tabu

"Marcia, Marcia, Marcia!"

During a surfing competition, Greg wears Bobby's taboo idol and "wipes out". Soon after, Greg, Peter and Bobby learn of the ancient superstition from a construction worker, Mr. Hanalei. This leads the boys to search for an ancient burial ground to return the idol to break the curse. However, when they arrive at the burial ground, they are unaware of a shadowy figure trailing them.